Chicken fillet à la cordon bleu

Ingredients for 4 servings:

• 4 chicken breast fillets (approx. 200 g each)
• 200 g mushrooms
• salt and pepper
• 2 tbsp oil
• 1 tbsp butter
• 4 slice(s) ham, cooked
• 100 g cheese, grated Gouda, medium-aged
• 1 tbsp butter
• 1 tbsp flour, heaped
• 250 ml vegetable stock
• 250 ml milk
• 75 g cheese, grated Gouda, medium-aged
• 1 egg yolk

Instructions

Working time approx. 30 minutes; Total time approx. 30 minutes

Wash the meat, pat dry, and season. Fry in hot oil for about 4-5 minutes on each side. Place the fillets in a greased baking dish and place a slice of cooked ham on each fillet. Heat 1 tablespoon of butter in the frying fat and fry the mushrooms, season with salt and pepper, and scatter over the fillets. For the sauce, melt the butter in the frying fat and sauté the flour in it. Stir in the broth and milk, and simmer for about 3 minutes. Add the cheese and melt. Season with salt and pepper to taste. Mix the egg yolk and a little of the sauce and stir into the remaining sauce (do not boil). Pour the sauce over the fillets and sprinkle with the remaining grated cheese. Bake in the oven under the broiler or at high heat until the casserole is golden brown.